Improved window-lock



UNITED STATES PATENT OEE1cE.`

IMPFiol/ED W|NDow-LocK- Specification forming part of Letters Patent No. 47,537, dated May 2, 1865.

.F0 all whon?, Vit 11i/ay concern.-

Be it known that I, FREDERIC G. FORD, of the city and county of Washington, in the District of Columbia, have invented new and useful Improvements in Burglar-Proof Spring Sash-Locks and I do herebydeclare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in Which- Figure 1 represents a broken-oft' section of a sash-frame with lock attached. Fig. 2 shows a front view of sash-rail and the face plate to the lock. Fig. 3 shows the reverse `side of rail and plate. Fig. 4 shows a detached faceplate and knob.

The object of my invention is to secure window-sash from the inside, so that they will not admit of being raised or opened from the outside, and also prevent the admission of a current of air between the rails of the upper and under sash to cause them to vibrate and make a noise, which is very annoying in Windy Weather. It is also applicable to inside shutv ters, or for securing the stop bead or cleat in window-f'ranics, or for fastening doors from the inside, for sliding sash in show-cases, and for many other purposes Where a cheap springcatch is needed.

ldyinvention consists in the construction of the face-plate and double slotted tube, theV semi-rotating sliding spring-bolt, the reverse i recessed guiding-plate, and the double-inclined recessed platecatch, the same being operated by a movable key, as hereinafter described.

To enable others skilled in the art to make, apply, and use my invention, I will describe it more fully, referring to the drawings, and to the letters of reference marked thereon.

llhe face-plate A may be made oval or of any desired form or device, it having a tube, a, secured to one side, in which are tWo shaped or longitudinal and right-angle slots c c, in which a pin, e, Works, the same passing through the rod or bolt B near the end, which has a portion of it squared, so as to admit of being pressed in and turned by a detachable key, C, to fasten and unfasten `the parts to which it is applied. A spiral spring, b, is placed on the rod B, one end resting against the pin e and the other end against a washer, d, and pin f at the extreme end of the rod or bolt B. When the lock is tted to the middle rail, D, of the lower sash, the face-plate A and the square end of the bolt B are on"the inside, the bolt and spring being concealed in the rail, the extreme end of the` bolt and the pin f being in the recess of ,theV ushplate g on the reverse side of the rail, between the middle rails of the upper and under sashes. Directly against the recessed plate g, on the up per sash, is secured the recessed double-inclined catchplate 71 so that when the rod 1B is pressed in by the key it enters the catchplateh, and by turning the rod B one-fourth of the Way round the pin ffollows up the inclines of the inside of the catch-plate and draws the joint. between the sash closelytogether and locks them firmly, so that the one cannot move without thevother, thus securing the window from being opened from the outside, or even from the inside 'without the key. The same inside or outside shutters to lock them to get-her or to fasten any othenpluce Where two surfaces come to a joint, and it can only be opened from the face side and by a tting key or knob. i

It-will readily be seen` that my improved burglar-proof sash-lock is a simple, eicient, and cheap, as well as a very neat and substantial,'device for the purposes for which it is designed and may be applied. It is easily fitted, requiring but little more than a round hole through the rail of the sash. Should the rail that the bolt is tted into be a little thin for the length of the bolt, the recessed inclined plate which is secured to the upper` sash may face, and

be sunk below the flush of the sur thus eifect the purpose of drawing the joint up close to keep out the air and pro vent any noise.

There is nothing, perhaps, more annoying to sick and nervous persons than the rattling of windows in a house, and various things hive been resorted to for a temporary reliefsuch as muftling with listing, wedges, 8vo. tion a thorough and permanent remedy is provided, while at the same time a most etlicient lock applied which is cheap and durable'. It is applicable to passen ger-car windows, and will prevent in a great measure the rattling of the car.

device may be applied to forcing in By the application of my inven-A to secure the windows closed is Having thusA described my invention, what plate-catch, the same being applied and op- I ela-im asnew, Patent, is

The faceplate to which is attached the double right-angle slotted tube, 'the semi- VVitnesses: rotating sliding spring-bolt, the recessed guid- R. D. O. SMITH, ing-plate, and the double-inclined recessed J. B. WOODRUFF.

and desire to secure by Letters erating in the manner as and for the purposes herein specified.

' FREDERIC G. FORD. 

